boundary condition for cross ventilation in single room
 

hi this is rahul , me taking room inscribe a outershell with one inlet of outershell and room and same for outlet and taking boundary conditions for outershell inlet, room inlet, room outlet and outershell outlet as follows velocity inlet, pressure inlet, pressure outlet and pressure outlet respectively.
so is this right please tell me..
i am confused.
my mail id is crazy_doyou@yahoo.co.in